Digital BW, The Print

Thanks Daniel,

I'd appreciate getting a copy of your script.  All I'm trying to do 
is create an overall adjustment curve to put on top of Paul's curves 
and hopefully get a smooth gradient.  As it stands now I cannot print 
anyting that has a fine gradient across it (like a side lit cylinder) 
because of the waves in the tonal space and I figured a detailed 
correction curve should be able to fix it.  16 pts seems pretty cheap 
from Adobe, though I guess they could be stacked if needed.  Going 
into ICC profiles seems like way more work and research than I'm 
willing to put in.  The other option is to do all the curves in 
something outside of PS...

Mark

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Daniel Staver" 
<daniel@p...> wrote:
> > how to make .ACV file from tabular data???  Is it really limited 
to 
> > only 20 points like in the curve dialog box?  
> 
> I wrote a perl script once that creates .ACV files from tabular text
> files. It's pretty specific in that it's only useful for 
linearizing a
> 21 step wedge. The text file has exactly 21 rows, and you need to 
skip 5
> rows in each column to get down to the allowed 16 points that 
photoshop
> will read.
> 
> If you insert more points than 16 (including the black and white 
points)
> Photoshop refuses to read the file.
> 
> In the Photoshop 5.0 SDK they allow for 19 points on the curve, so 
they
> must have cut down on the allowed number in one of the later 
versions.
> 
> It probably wouldn't take too much work to create a general purpose
> script that could have completely separate input/output values for 
each
> channel. Right now the input value is the same for all three 
channels
> while the output values are different. I use this to measure a patch
> with a densitometer for the input value and then I place the RGB 
values
> for that patch at the corrected point.
> 
> Le me know if you're interested in a copy of the script.
> 
> --
> Daniel Staver
> http://daniel.staver.no
> 
> > Ok, thanks, but still, how do you do it?  ie. what application?  
> > Thanks for help in what should be simple... I just don't know how 
to 
> > do it:)
> > 
> > Your help is greatly appreciated!